Overclock.net banner

1 - 6 of 6 Posts

·
Registered
Joined
·
44 Posts
Discussion Starter · #1 ·
I don't know how to time or what voltage to make my RAM stable at 2666mhz I'm using 8x4gb. Also I have a question regarding XMP 2.0 which I can't get to work either. My ram just sits at 2133mhz and I am wondering what timings and voltage people are using. My bios is 1106.

Thanks,
M.
 

·
Registered
Joined
·
1,297 Posts
Do you mean 4x8GB (32GB Kit) or you got two 4x4G (32GB Total).

Also what model number is it, as there are variations at the selected speed.

Anyways the C16 (CAS 16) will run the following:
15-15-15-36 @2133MHz 1.2V
16-18-18-35 @2666MHz 1.2V

These are the settings they were tested at.

The C15 (CAS 15) model will run the following:
15-17-17-36 @2133MHz 1.2V
15-17-17-35 @2666MHz 1.2V

So it depends on which model you got. The motherboard QVL has all those listed as well so it should be fully supported.

Personally I would just set DRAM Frequency on DDR4-2666MHz manually and hit up DRAM Timing Control and put the timings for what 2666 is rated for, for that particular brand and set the DRAM Voltage (CHA, CHB) and (CHC, CHD) both to 1.2V, leave everything else on auto and call it a day lol.

But heres the tricky part
and is probably where you're at right now. Trying to run it manually like traditional ram settings 2133MHz is fine for 100BLK, but to hit 2666MHz or even 2800MHz you may need to lower your base multiplier and increase the BLK. (The problem could be that you're using XMP that puts 125 (stock 100) BLK, pushing multiplier to higher clocks ie: 125 X 35 = 4.4GHz).

A normal 2133MHz @ 100 BLK will result in lets say... x35. 100 X 35 = 3500MHz.
At 2666MHz @ 125 BLK will result in lets say... x35. 125 X 35 = 4375MHz.

So if this is the case, and say you want to keep stock speeds of a 5930K (3.7GHz), you could do a 125 BLK/strap or use XMP and use a x30 multiplier for Core Ratio Limit.

If you want to overclock later on you would do it like regular overclocking and adjust voltages accordingly to the max frequency.
biggrin.gif


TL;DR If you want to use XMP that uses 125 Strap you may need to lower multiplier (x30), of course if you find the right voltage for 4.4GHz you could do default/auto XMP using the x35 multiplier with the 125 strap.

 

·
Registered
Joined
·
1,297 Posts
Quote:
Originally Posted by miyaspark View Post

Hey thanks and sorry it's an 8x4gb configuration.
Lol if you need any clarification let me know, I kinda wrote this up at 2am
tongue.gif
so my brain was probably gone already
redface.gif


Sent from my Nexus 5 using Tapatalk
 

·
Registered
Joined
·
1,297 Posts
Quote:
Originally Posted by miyaspark View Post

Also to add to this I'm running my 5930k at 4.7ghz.
So if you're doing x47 x100 = 4700MHz, have you tried x37 or 38 multiplier x125 (XMP) to get you 4625/4750MHz? If it still doesnt post try upping the ram voltage to 1.3 or 1.35V.
 
1 - 6 of 6 Posts
Top